Surface-coating composition



UNITED STATES ALBERT C. .HOLZAIPFEL, OF NEW YORK, N. Y.

SURFACE-COATING COMPOSITION. I

No Drawing.

To all whom it may concern:

Be it known that I, ALBERT C. HOLZAPFEL, a subject of the King of Great Britain, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improve.- ments in Surface-Coating Compositions, of which the following is a specification.

This invention relates to a surface coating composition, such as a paint, varnish, or

the like, primarily intended for coating,

metal, and particularly iron and steel,but which is also adapted for coating wood and other materials.

Pitches or waxes derived from the treatment of oils and fats, such as stearin pitch, palm oil pitch, and the like, have been used in the manufacture of surface coating compositions, and in a prior application, Serial No.'384,174, filed May 25, 1920, I have disclosed and claimed a surface coating composition comprising pitch derived from the treatment of oils and fats and a hydrocarbon solvent.

In the present invention, I have produced a composition comprising a residual pitch, such as stearin pitch, palm oil pitch, and the like; a hydrocarbon solvent of the pitch or wax, such as a distillate of taroil having a flashpoint between 70 and 120, and titanium oxid, in suitable proportions. Gums and resins, such as copal, dammar and the like may be employed if desired.

In a typical embodiment of the invention, a satisfactory paint may be manufactured by merely dissolving from approximately 30 to 4.0 parts by weight of the pitch or wax, derived from the treatment ofoils and fats, in to 70 parts by weight of' a distillate of tar oil having a flashpoint between 7 0 and 120, or other hydrocarbon solvent of the pitch or wax. The employment of copal, dammar, or other gum or resin is optional. If the gum or resin is employed it may be present in from 10 to 20 parts by weight of the mixture, replacing an equal quantity of pitch.

When the pitch or wax, or the pitch and gum or resin, has been thoroughly dissolved. titanium oxid. is added to the mixture, in the proportion of from 1 to 50 parts by weight, and preferably from 10 to 25 parts by weight.

Linseed oil or any of the oils commonly used in the manufacture of oil paints may be added to the composition, but the addition Specification of Letters Patent.

Patented May 24, 1921.

Application filed November 29, 1920. Serial No. 427,184.

of such oil is not necessary. If such oil is used, I prefer to add it in approximately the proportions of- 5.to 20 parts by weight to 80 to 95 parts by weight of the solution of stearin or other pitch derived from the'treatment of oils and fats.

The preferred proportions will vary chiefly according to the character of the pitch used, the season of the year,'and the temperature at which the paint is to be appl ed, as will be readily understood by those skilled in the art. It is to be understood that these proportions may vary widely wlthln the limits of the solubility of the pitch in the solvent used, but the proportions set forth above have been found to be the most satisfactory.

It is to be understood that while a distillate of tar oil having a. flashpoint between 70 and 120 is referred as a solvent for the pitch, other ydrocarbon solvents may be used with a considerable measure of success and are, to such extent,'equivalentsof .the tar oil. Similarly, other paint oils may be used in place of linseed oil, and are to be regarded as equivalents of linseed oil for use in the composition.

The varnish or paint produced in accordance with the invention is applied in the usual way, either by brush or spray, and dries rap dly, usually within an hour, with a ood, smooth gloss.

t is to be understood that the form of my invention herewith described is to be taken as a preferred example of the same, and that various changes may be resorted to in the proportion of the several ingredients and that known chemical equivalents may be employed without departing from the spirit of the invention orthe scope of the subjoined claims.

Having thus described my invention, I claim: I

- 1. A surface coating composition containing pitch derived from the treatment of oils and fats, a hydrocarbon solvent, and titanium oxid.

2. A surfacecoating, composition containing approximately from 30 to 40 parts by weight of pitch derived from the treatment of oils and fats, 60 to 70 parts by weight of a hydrocarbon solvent, and'not more than 25 parts of titanium oxid.

3. A surface coating composition containing approximately from 30 to 10 parts by weight of pitch derived from the treatment of oils and fats, 60 to 70 parts by Weight of a distillate of tar oil having a flashpoint between 70 and 120, and not more than parts of titanium oxid.

4. A surface coating composition containing approximately to parts by Weight of stearin pitch, to parts of tar oil, and from 10 to 25 parts of titanium oxid.

5. A surface coating composition containing approximately 30 to 40 parts by Weight of stearin pitch, 60 to 70 parts by weight of a hydrocarbon solvent, and 10 to 25 parts by welght of titanium oxid.

6. A surface coating composition containing pitch derived from the treatment of oils and fats, gum, a hydrocarbon solvent, and titanium oxid.-

7. A surface coating composition containing stearin pitch, gum, a hydrocarbon solvent, and titanium oxid, the combined Weight 20 of the stearin pitch and gum being less than the Weight of the hydrocarbon solvent.

8. A surface coating composition containing stearin pitch, gum, tar oil, and titanium oxid, the combined Weight of the stearin pitch and gum being less than the Weight of the tar oil.

In testimony whereof I aflix my signature in presence of two Witnesses.

Witnesses:

H. E. LEHAN, F. W. PETRI. 

